Hello folks, this is my first post, and I hope you people can help me.
The board and the program below is to create a light metronome (if I get this one right, I'll add sound too). So when it starts in 2/2 mode, the red led blinks once, waits a little bit, then the green one blinks, and the process starts over. If you press the button for at least 0,5 s (so you can get status0 and status1 to be 1, so status2 goes 1 too and you go into next tempo - this is all in order to avoid debouncing (status0 and status1) and changing tempo if I keep the button pressed (status2)), you get into 3/3 mode, so red blinks once and green blinks twice, with a wait inbetween. Press the button again and you go into 4/4 mode, so red led blinks once and green three times, with a wait inbetween. Press the button again and you go into 2/2 again. The button is pulled down by a 10K resistor. But when I run it, quite often I press the button, but instead of having the red and green led blinking as shown above, I get only the green one blinking indefinitely, and doesn't matter how much I press the button, the green one keeps on blinking. What am I doing wrong?
/*
* Metro2
*
* Simple metronome with tempo control
*
*/
int ledvm = 13; // Red LED port 13
int ledvd = 12; // Green LED port 12
int btn1 = 11; // Button 1 port 11
int tempo = 2; // Beats ie 2/2 3/3 or 4/4
int i = 1; // Beat counter
int status0=0; // Status 0
int status1=0; // Status 1
int status2=0; // Status 2
void setup() // Runs once
{
Serial.begin(9600); // Serial at 9600 bps
pinMode(ledvm, OUTPUT); // Port 13 is LED output
pinMode(ledvd, OUTPUT); // Port 12 is LED output
pinMode(btn1, INPUT); // Port 11 is button input
}
void loop() // Repeating part
{
status0=digitalRead(btn1);
if (status0==0 && status1==0 && status2==1) {status2=0;};
if (status0==1 && status0==status1 && status2==0)
{
tempo++;
status2=1;
if (tempo>4) {tempo=2;};
Serial.println(tempo);
};
if (i==1)
{
digitalWrite(ledvm, HIGH); // turns red LED on
delay(50); // waits 0,050 s
digitalWrite(ledvm, LOW); // turns red LED off
delay(450); // waits 0,450 s
}
else
{
digitalWrite(ledvd, HIGH); // turns green LED on
delay(50); // waits 0,050 s
digitalWrite(ledvd, LOW); // turns green LED off
delay(450); // waits 0,450 s
};
if (i==tempo) {i=1;} else {i++;};
status1=status0;
}
